Mars previously worked with Box on the ABC spy series Alias, created and executive produced by Star Trek producer and director J.J. Abrams. Mars also performed stunts on Abrams' hit series Lost, on which he doubled actor Josh Holloway ("Sawyer").

More recently, Mars was a stuntman on the upcoming Paramount Pictures release, Indiana Jones and the Kingdom of the Crystal Skull. He also acted in and performed stunts for the independent feature The Red Canvas, starring John Savage and George Takei. His other upcoming films include The Express (featuring Clancy Brown), Hancock, and Step Brothers.